You might be able to get folks to agree if you tweak the system a bit.
Get a pallet tank/IBC tote. Then fill it with hay/woodchip/shaving/bark/etc.
At the bottom put a layer of gravel and nylon mesh to separate the gravel from hay.
Add red wrigglers to the tank, they will mix it for you. All you have to do is add hay/woodchip once every 6months.
With this system you can still use a flush toilet (regular/low-flow/vacuum assisted) and it can also handle your greywater too. The water that exits the system is just sent to a mulch pit like with a greywater system. In fact you can 'sell' this system as an advance septic system, with a 250gallon tank that settles/aerate/ckarify the waste, then removes the nitrogen, phosphates/etc. Instead of a reed bed/lagoon/drainfield you use fungi to absorb the minerals, and instead of bad microbes they are outcompeted by good ones and even actively eaten by mushrooms like oyster mushroom, all in a mulch pit. You dont have to empty the compost if you dont want to because it self-empties and the mushroom distributes the minerals for you and helps break down pharmaceuticals.
http://www.vermicompostingtoilets.net/design-construction/
Iterations are fine, we don't have to be perfect
My 2nd Location:Florida HardinessZone:10 AHS:10 GDD:8500 Rainfall:2in/mth winter, 8in/mth summer, Soil:Sand pH8 Flat